Re: Cohen's Ecologic Studies

[epirad@mchsi.com]

Dr. Cohen,



Since you use mean rates for the county that carries 

with it the baggage of assuming linear relationships 

within county.  



Bill Field 

> 	This is the first information I have received about this paper,

> and I am trying hard to obtain a copy of it. I don't understand much from

> the abstract, but I must say that I do not assume that anything is linear

> other than the relationship between radon and lung cancer which is the

> theory I am testing.

> 

> Bernard L. Cohen

> Physics Dept.

> University of Pittsburgh

> Pittsburgh, PA 15260

> Tel: (412)624-9245

> Fax: (412)624-9163

> e-mail: blc@pitt.edu

> 

> 

> 

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